Most discussions on schemas center on the best possible vocabularies or on how to organize a schema efficiently (Russian dolls, Venetian blinds, salami slices, and so on).
Also, the dispute about the most appropriate schema language is ongoing -- is it DTDs, W3C's XML Schema, or OASIS' Relax NG? Yet when you design an XML application, it's even more important to know what to do with the schema.
The first step we should do is to learn how to parse and print a simple XML document using both DOM and SAX.
For an XML document to be based on an XML schema, the XML document is required to be validated with the schema.See the full Statement on Supported Versions and Dependencies To facilitate the deployment of JDOM 2.x, the entire JDOM package has been renamed.If you are migrating to JDOM 2.x from previous JDOM versions you will need to change your package imports from * to org.jdom2.* JDOM 1.x versions are operating in maintenance mode only and only bug fixes will be considered for future 1.x releases.Validating is useful -- after all, what's the point in processing documents if the application does not recognize the elements?Yet to be of any use, it is important that the application validate against a known schema, which, until JAXP 1.2, was easier said than done.The Xerces2-j parser may be obtained from the Xerces2-j page.